Journal
POLYMER TESTING
Volume 57, Issue -, Pages 149-155Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2016.11.032
Keywords
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Funding
- Strategic Initiative for Materials (SIM-Flanders) through the M3-AMCAE (IWT-project) [130526/27]
- A-STREAM-AFO (IWT-project) [140164/65]
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This work presents an in-depth study on the mechanical behavior of selective laser sintered (SLS) nylon (PA-12). The entire visco-elasto-plastic response is determined based on experimental data obtained through tensile, compression, shear and relaxation testing. In addition, ultrasonic non-destructive testing is proposed as an alternative to conventional testing for the derivation of the elastic properties of this material. An isotropic elastic behavior was observed, while a clear orthotropic and non-linear response was found for both the plastic curves and the relaxation behavior. Strength data suggests laser sintered PA-12 will fail in tension rather than in shear. The ultrasonic tests correspond well to conventional tensile data (at high rates), and represent a cost-effective alternative to extensive conventional tensile testing. The presented test data can potentially be used to derive a detailed material model suitable for modelling static, fatigue and impact applications using 3D printed PA-12. (C) 2016 Elsevier Ltd. All rights reserved.
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